Which of the following best illustrates a vessel's maneuverability?

A fishing vessel restricted by nets does not effectively demonstrate maneuverability. Maneuverability refers to how easily a vessel can change its direction or speed. In this context, a fishing vessel that is hindered by nets is likely to have limited ability to maneuver quickly or change course, as the nets can create physical limitations and responsibilities for the crew.

On the other hand, a sailboat that can pivot easily in the wind exemplifies good maneuverability. Sailboats are designed to adjust quickly to changing wind conditions, allowing them to make sharp turns and navigate through various water conditions efficiently. Their ability to harness wind power also contributes significantly to their agility on the water.

A powered catamaran with multiple engines is also designed for maneuverability, as the twin hulls provide stability and the multiple engines allow for precise control, making it capable of quick turns and agility in various situations.

A cargo ship with fixed routes typically has a predefined path it follows and requires a significant amount of time and distance to change speed or direction due to its size and weight, making it less maneuverable overall.

Understanding these characteristics helps clarify why a sailboat showcases the best maneuverability among the options given.